Engraving machine



FIG. 1 is a perspective view of an engraving machine, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is top view thereof;

FIG. 5 is another side view thereof; and,

FIG. 6 is a rear view thereof.

The broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while all other broken lines are directed to environment and are for illustrative purposes only; the broken lines from no part of the claimed design.

The bottom of the engraving machine forms no part of the claimed design. 

CLAIM The ornamental design for an engraving machine, as shown and described. 